Variety
of Outputs
The InterBus Network Resolver is available with Binary, Gray Code,
or BCD absolute position output formats.
Power
Supply
An existing power supply can be used to power the InterBus Network
Resolver. That is, if a PLC operates at 24 VDC, a 16-32 VDC
Network Resolver model can be connected to the same power supply,
thus cutting the system cost.
Flexible
Programming of Counts-Per-Turn
The advanced R-to-D converter used in the InterBus Network
Resolver has made it possible to program any number of scaled
Binary, BCD, or Gray Code counts-per-revolution. The default
encoding format is set to 10-bit Gray Code.
Bus
Isolation
This unit is equipped with optical isolation between the InterBus
input port and the InterBus output port.
INTERBUS NETWORK RESOLVER
The
InterBus is a fieldbus designed for high-speed data transfers at
the sensor actuator level. At this level, InterBus controllers
(e.g., PLCs, PCs, etc.) exchange data with their field devices
(1/0, drives, valves, resolvers, etc.) via a high-speed RS422A
serial link.
RS-422A
transmission is the transmission technology used by InterBus, and
it is very easy to handle. Installation of the twisted-pair cable
does not require expert knowledge. The repeater bus structure
permits easy addition and removal of end stations on the network.
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The
unit is designed to be a single-turn digital resolver residing on
an InterBus network. It's configured to look like one 16-bit
output word and one 16-bit input word to the network. Four bits of
the output word select the encoding format and scale factor of the
resolver. The other 12 bits of the output word are unused. 10 or
12 bits of the input word arc used for the encoded position data.
The unused bits of the input word are always zero.
The
unit's position data can be encoded in three different data
formats. For each data format there is a choice for maximum counts-per-revolution.
Following are the possible data encoding format choices:
Data
exchange commands must be initiated from the InterBus controller.
Output encoding data is sent from a controller as a 2-byte output
word (16 bits). Byte N is the most significant 8 bits of the data
word. Byte N+ I is the least significant 8 bits of the data word.
Input position data is returned to an InterBus controller from the
InterBus Network Resolver as a 2-byte input word (16 bits). Byte N
is the most significant 8 bits of the data word. Byte N+ I is the
least significant 8 bits of the data word.
Note.
The number of position
data bits returned is a function
of the data format
and the maximum counts per revolution of the resolver.
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